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MOTOGUY128's Photo MOTOGUY128 SparkPoints: (0)
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5/5/11 2:29 P

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Here the link to Michelin's Site:

www.michelinbicycletire.com/michelin
bi
cycle/index.cfm?event=airpressure.view


So for myself at 160lbs, I'm between 108-110psi... which is where I tend to inflate it. With the rough roads near my home when training, I sometime use around 102-105.

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EATNBOOGERS's Photo EATNBOOGERS Posts: 2,215
5/4/11 10:46 A

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Good info... never considered this!

Kristine

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BLC 21 Powerful Prism Panthers team!

Run a beautiful race.

"To give anything less than your best is to sacrifice the gift. " --Steve Prefontaine



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HAVELIN5's Photo HAVELIN5 SparkPoints: (6,239)
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4/24/11 12:14 A

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This is great advice and very timely too, my husband and I were just discussing this question yesterday. Thanks for posting!

The difference between those who reach their goals and those who donít is staying motivated. If youíre motivated, youíll keep going. If you keep going, eventually youíll reach your goal. - Zach Van Hart, SP staff writer


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GLADGAD's Photo GLADGAD Posts: 5,690
3/18/11 12:16 P

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Thanks so much for this information. I am around 120 lbs and I have always inflated my tires to max, on both my mountain and road bikes. I will follow your advice and check out the manufacturer's recommendations. I'll deflate the tires a bit and see how the ride feels.

-Carolyn

"God gave you your body as a gift, so you should take care of it." - My Mom
NUBIENNZE's Photo NUBIENNZE SparkPoints: (13,476)
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3/18/11 9:59 A

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Very helpful info... emoticon

The journey of a thousand miles begins with a single step.

-Lao Tzu


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MOTOGUY128's Photo MOTOGUY128 SparkPoints: (0)
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3/18/11 9:50 A

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I don't know if this info has been posted before.

It's a myth that you should always use the highest tire pressure writtne on the side of the tire. For example, in Mountain Biking, you might only use max pressure for a very dry, hardpacked, smooth course taht's not too dusty. You also might use max pressure if you're over 200lbs and ride "hard" to prevent pinch flats. You cna also run higher pressures with full suspension bikes.

On road and tri bikes, max pressure is only needed if you over about 190lbs. Each mfg will have different recommendations. But a a good rule. Min pressure will be around 90-95psi (or as printed on the sidewall). Use this pressure if your under about 120lbs. if you're around 140-150lbs you might use 105-110psi (on a tire rated for 116-120max).

Also, don't forget about air temperature and the sun. If you inflate a tire in the morning of a race, by the time the sun heats it up, you may have gained 10psi. I've also heard of tires expolding on the back of rear mount bicycle racks where one of the tires is subjected to the hot exhaust of the car. At freeway speeds the temps even 12" away could be upwards of 150F. So you are slow roasting your tire.

again, check mfg websites for the recommended pressures for your weight range. On rough courses, you can drop another 2-5psi as well. Having too high of pressure can cost you energy over bumps that will more than offset any gains on flat smooth roads. Even the smoothest roads have some surface aberations that are like micro bumps. This is costing you speed if you tire cannot flex optimally.

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